There are simply too many to list. It really depends on what colors you like to play. I'm just going to list the combos with the most wins.
-Dragonstorm: The Sorcery Dragonstorm with Rite of Flame and Seething Song to provide the mana. It uses 4 Bogarden Hellkite and 2 Hunted Dragon. Also, it runs Remand and Gigadrowse to stall their opponent.
-Dralnu de Louvre: Dralnu, Lich Lord with counters and Teferi, Mage of Zhalfir. Some builds use Mystical Teachings as well.
-Boros deck wins: Its a Red/White aggro deck with alot of small guys and burn spells.
-'Tron: this decktype has a good number of decks. 'Tron is short for Urzatron which is a nickname for the original Urza lands: Urza's Mine, Urza's Tower, and Urza's Power Plant. When all 3 are in play they produce a total of 7 colorless mana. The most popular 'Tron deck is Izzetron, which is Blue/Red with Bogarden Hellkite and Wildfire.
-Mono Green: There are 2 mono Green deck right now: evasion and haste. Evasion has creatures like Yavimaya Dryad and Scryb Ranger to swing in for small amounts of damage...at first. Evasion also runs Moldervine Cloak and Blanchwood Armor and so the games are much shorter than you'd think. Haste runs creatures like Timbermare and Groundbreaker to combo with Primal Forcemage. It uses Might of Old Krosa and Stonewood Invocation to pump creatures up for a fast win.
-Soggy Pickles(yes...thats the deck's real name): This deck capitalizes on the synergy between Brine Elemental and Vesuvan Shapeshifter. You play Brine Elemental and Vesuvan Shapeshifter facedown and then use Momentary Blink to flip Brine Elemental faceup at the end of your opponent's turn. Once you untap you can just Morph Vesuvan Shapshifter and now your opponent can't untap during their next turn, which you can do each turn since you can turn Vesuvan Shapeshifter facedown every upkeep.
Go to http://ww2.wizards.com/Gatherer/Index.aspx if you want to look up any of the mentioned cards.